Folding door structure and assembly



Dec. 7, 1965 J. RUDNICK FOLDING DOOR STRUCTURE AND ASSEMBLY 5Sheets-Sheet 1 Filed Feb. 18, 1963 INVENTOR. JACK RUDNICK M Map ATTORNEYDec. '7, 1965 J. RUDNICK 3,221,804

FOLDING DOOR STRUCTURE AND ASSEMBLY Filed Feb. 18, 1963 5 Sheets-Sheet 2INVENTO JACK RUD K ATTORNEY Dec. -7, 1965 J. RUDNICK 3,221,304

FOLDING noon STRUCTURE AND ASSEMBLY Filed Feb. 18, 1965 5 Sheets-Sheet 5w! iiil h /Z5 INVENTOR if v JACK RUDNICK ATTORNEY Dec. -7, 1965 J.RUDNICK FOLDING DOOR STRUCTURE AND ASSEMBLY 5 Sheets-Sheet 4 Filed Feb.18, 1965 INVENTOR. JACK R U DN ICK ATTORNEY Dec. 7, 1965 J. RUDNICKFOLDING DOOR STRUCTURE AND ASSEMBLY 5 Sheets-Sheet 5 Filed Feb. 18, 1963Fl G 2O ml| IIHH HIHH ITO F'IG.19

IN VEN TOR.

JACK RUDNICK wa? WW ATTORNE y United States Patent 3,221,804 FOLDINGDOOR STRUCTURE AND ASSEMBLY Jack Rudnick, Bronx, N.Y., assignor to lackRudnick, New York, and Benjamin Rudnick, Tarrytown, N.Y. Filed Feb. 18,1963, Ser. No. 259,327 11 Claims. ((31. 1602(36) The present inventionrelates generally to improvements in door structures and the like and itrelates more particularly to an improved mounting structure for doors ofthe folding type.

The employment of folding type doors affords numerous advantages in manyapplications. This is particularly true where the area to be opened andclosed is of great width. The use of the conventional swinging doorsunder these conditions is unsuitable since the width of a single panelswinging door is limited for mechanical and space reasons and provisionof a plurality of side by side individually swingable doors is not onlyinconvenient and unattractive but is structurally awkward and expensive.Sliding doors have been frequently used in these applications but theselikewise leave much to be desired. While the folding type of door offersmany advantages when employed in covering large areas and in regions oflimited space they possess certain drawbacks. The erection and mountingof the conventional folding door is a laborious and time consumingprocedure contributing significantly to the expense thereof. The doorframes and openings to closets and like areas found in apartments andinexpensive housing, even though designed to standard dimensions,generally not only deviate appreciably from the specified dimensions butare frequently considerably off plumb. As a consequence, each set ofdoors must be individually fitted and adjusted, a procedure which hasbeen highly inconvenient and uneconomical and often resulted in astructure of rough and unreliable operation and of unattractiveappearance.

It is therefore a principal object of the present invention to providean improved door structure.

Another object of the present invention is to provide an improved doorstructure of the folding type.

Still another object of the present invention is to provide an improvedmounting structure for folding doors.

A further object of the present invention is to provide an improvedfolding door mounting structure permitting the rapid erection of thedoor and adjustment thereof to compensate for variations from true plumband established dimensions.

Still a further object of the present invention is to provide a foldingdoor mounting structure of the above nature characterized by itsadaptability, versatility, ruggedness and low cost.

The above and other objects of the present invention will becomeapparent from a reading of the following description taken inconjunction with the accompanying drawings, wherein:

FIGURE 1 is a front perspective view of a two section double panelfolding door embodying the present invention;

FIGURE 2 is an enlarged detailed fragmentary sectional view taken alongline 22 in FIGURE 1;

FIGURE 3 is an enlarged detailed sectional view taken along line 33 inFIGURE 1;

FIGURE 4 is an enlarged detailed front fragmentary view of the doorupper pivot assembly, the door panel being shown in broken linepreparatory to such assembly;

FIGURE 5 is an enlarged detail front fragmentary view of the door lowerpivot assembly;

FIGURE 6 is an enlarged detail front fragmentary view of the door rollerguide assembly;

3,221,804 Patented Dec. 7, 1965 FIGURE 7 is an exploded perspective viewof the lower pivot base plate assembly;

FIGURE 8 is a bottom perspective view of the pivot journal block inaccordance with the present invention;

FIGURE 9 is a transverse sectional view of a track and upper pivotassembly of another embodiment of the present invention;

FIGURE 10 is a bottom plan view of the pivot journal block;

FIGURE 11 is a top plan view thereof;

FIGURE 12 is a sectional view taken along line 1212 in FIGURE 10;

FIGURE 13 is a sectional view taken along line 13-13 in FIGURE 10;

FIGURE 14 is a sectional view taken along line 14-14 in FIGURE 10;

FIGURE 15 is a fragmentary rear elevational view of another embodimentof the present invention;

FIGURE 16 is a sectional view taken along line 1616 in FIGURE 15 FIGURE17 is a sectional view taken along line 17-17 in FIGURE 15;

FIGURE 18 is a fragmentary top plan view of the track member;

FIGURE 19 is a sectional view taken along line 1919 in FIGURE 20; and

FIGURE 20 is a fragmentary front elevational view of another embodimentof the present invention.

In a sense the present invention contemplates the provision of a doorstructure comprising a track member, a journal block engaging said trackmember and having a vertical socket formed therein provided with anentrance opening and an inclined guide surface leading to said entranceopening, a door panel, a substantially vertical pivot pin mounted onsaid door panel and axially movable between an advanced positionengaging said socket and a retracted position, and spring means urgingsaid pivot pin to its advanced position, said pivot pin being slidablealong said guide surface to effect the retraction thereof approachingsaid socket opening.

According to a preferred form of the present structure the door ismounted in a frame delineated by a head, sill and jambs, the head beingprovided with a longitudinally extending depending bar. The track memberincludes an upwardly directed longitudinal channel engaging the head barand a downwardly directed track defining channel having depending legsprovided with inwardly directed flanges. A first journal block slidablyregisters with the track and rests on the flanges and has a verticalsocket defining bore formed therein. A longitudinally inclined guidesurface extends upwardly from the socket downwardly facing opening tothe upper edge of the journal block. A second journal block is mountedon the sill in vertical alignment with the first journal block andincludes a base plate secured to the sill and an apertured journal platelongitudinally adjustable along the base plate. The door, per se,includes a pair of first and second rectangular panels hinged to eachother along adjacent inner edges. The first panel carries a follower atits upper outer corner registering with the track. A vertical well isformed in the upper outer corner of the second panel and the first pivotpin slidably registers therewith and is urged to a raised position intoengagement with the first journal block socket by a compression springentrapped between the well base and the first pivot pin. A bracketreinforces the second panel upper outer corner and includes a top webcarrying a bushing entering the well and engaging the first pivot pinand depending plates embracing the second panel. A second bracketengages the second panel lower outer corner and includes a bottom webunderlying the panel bottom edge and having a tapped opening registeringwith a vertical well in the panel. A second pivot pin engages the secondjournal block and is provided with an upwardly directed threaded shankengaging the bracket tapped opening and having opposite longitudinalextending flats formed therein for the reception of a tool.

Referring now to the drawings, and more particularly to FIGURES 1 to 9thereof which illustrate a preferred embodiment of the presentinvention, the reference numeral 10 generally designates the improvedfolding door structure illustrated as including two oppositely hingedpairs of panels, it being understood that the present mechanism isadvantageously applicable to door structures of any desired number ofpanel pairs. The door structure 10 is associated with a door frame whichmay be located and delineated as desired, such as for example, a closetopening, and includes a head 11, a sill 12, and opposite side jambs 13,which may be in the form of a unitary fabricated frame or which may bedefined by other structural sections. Secured to and extendinglongitudinally along the head 11 for substantially the length thereof isa rectangular positioning strip or bar 14 which may be continuous or maymerely comprise two or more longitudinally spaced aligned blocks.

Extending for substantially the full length of the head 11 andregistering with the positioning bar 14 is a track member 16 which is ofuniform transverse cross-section and may be formed of any suitablematerial such as aluminum, a synthetic organic plastic material, or thelike. The track member 16 comprises an upper channel section engagingthe bar 14 and including a transversely stepped cross Web 17 defined byupper and lower levels 18 and 19 respectively separated by anintermediate step 20. Directed upwardly from the longitudinal edges ofthe cross web 17 are front and rear vertical legs 21 and 22 whichtightly embrace the bar 14 and frictionally engage the side facesthereof, the Web upper level 18 abutting the underface of the bar 14.The front leg 21 depends below the Web level 18 and terminates in across arm 23 coplanar with the web level 19 and having depending fromits front edge a front track leg 24. Depending from the web level 19 isa rear track leg 26, symmetrically positioned relative to the front leg24. Directed inwardly from the track legs 24 and 26 adjacent their loweredges are track flanges 27 terminating in upwardly directed lips 28. Theweb level 18, legs 24 and 26 and flanges 27 delineate a longitudinallyextending track 29.

A first journal block 30 of a transverse cross-section substantiallymating the track 29, slidably registers with the track 29 and isreleasably locked therein in a predetermined position adjacent a jamb13. The journal block 30 is integrally formed of nylon or other suitablematerial and includes transversely directed longitudinally extendingside bars 32 registering with the spaces delineated by the track flanges27, the track legs 24 and 26 and the overlying sections of the web 17and cross arm 23. The side bars 32 terminate in depending lips 33 whichregister with the grooves delineated by the lips 28 and legs 24 and 26.The top face of the journal block 30 is flat and closely confronts theunderface of the web level 18. The trailing section 34 of the underfaceof the journal block 30 is horizontal and flat and a cross block 36depends from its outer border into engagement with the space betweenflanges 27.

A socket defining vertical bore 37 is formed in the block 30 in the areaof the section 34 and is transversely offset relative to the mediallongitudinal axis of the block 30. The underface of the block 30inwardly of the side bars 32 comprises a longitudinally inclined face 38extending from the leading upper edge 39 of the block 30 to the leadingedge of the underface section 34. Depending from the block 30 along theleading side border of the inclined guide surface 38 and projecting tothe level of the underface of the flanges 27 is a block 39 having a flatunderface 40 and a tapered end face 41 directed from the leading cornersof the blocks 30 and 41 rearwardly toward the longitudinal medial axisof the block 30 to delineate a funneled opening to the guide surface 38.It should be noted the guide surface 38 is bordered by verticalconfronting faces 42 of the blocks 30 and 38 which terminate at thesection 34.

A vertical bore 43 is formed through the block 40 inwardly of the bar 32and flange 27 and terminates at the top of the block in a well ofhexagonal transverse cross-section. A hex nut 44 snugly nests in thehexagonal well and is engaged by a bolt 46 projecting through the bore43 and carrying a washer 47. The washer 47 abuts the block underface 40and the underface of the flange 27 so that the tightening of the bolt 46effects the securing of the block 30 along a preselected position in thetrack 29.

A second journal block 48 is mounted on the sill 12 in verticalalignment with the first journal block 30 and includes a base plate 49and a channel shaped journal plate 50. The base plate 49 is ofrectangular configuration and has formed therein a pair oflongitudinally spaced transverse slots 51 and a pair of longitudinallyspaced apertures 52 to facilitate the transverse adjustable mounting ofthe base plate 49 to the sill 12 by means of suitable screws. Afiixed tothe front border of the base plate 49 is a flat mounting plate 53 havingend recesses 54 formed therein. A tapped vertical bore 56 is formed inthe superimposed plates 49 and 53 and is centrally located in the plate53.

The journal channel plate 50 straddles the plate 53 and includesdepending longitudinal side legs 57 embracing the side edges of theplate 53 and resting on the plate 49, and a cross web 58. A longitudinalslot 59 is formed in the cross web 58 in registry with the tapped bore56 and a bolt 60 registers with the slot 59 and engages the tapped bore56 to permit the longitudinal adjustment of the journal plate 50 and thelocking thereof in a preselected position. A journal aperture 61 isformed adjacent an end of the cross web 58.

The door, per se, includes a pair of vertical substantially rectangularfirst and second side by side panels 63 and 64 respectively swingablyjoined to each other by a vertically extending piano hinge fastened tothe respective inside faces of the panels 63 and 64 along their adjacentor inner edges to permit the mutual folding of the panels 63 and 64 withtheir adjacent inner edges advancing outwardly as seen in the left handpair of panels in FIGURE 1. A vertical cylindrical well 65 is formed inthe top face of the upper outer corner of panel 64 remote from the innerhinged edge thereof.

A bracket 66 embraces the upper outer corner of the panel 64 andincludes a top rectangular web 68 overlying the outer top edge of thepanel 64 and provided with an apertured crowned section 67 in verticalregistry with the well 65. Depending from the rear edge of the web 68 isa relatively deep rear plate 69 which abuts the rear face of the panel64 and is secured thereto by suitable screws registering withcorresponding openings formed in the plate 69. A relatively shallow wallor flange 70 depends from the front edge of the web 68 and abuts thefront face of the panel 64. A bushing 71 is secured to the underface ofthe apertured crowned section 67 and depends therefrom into telescopingregistry with the well 65. A vertical cylindrical pivot pin 72 having arounded top end slid-ably registers with the bushing 71 and extends intothe well 65 and above the crown section 67. The bottom of the pivot pin72 is formed with a peripheral flange 73 of greater diameter than theinside diameter of the bushing 71. A helical compression spring 74 isentrapped between the bottom of the well 65 and the bottom of the pivotpin 72 to resiliently urge the pin upwardly to it advanced or raisedposition, the pin being fully retractable by downward pressure thereonto the level of the crown section 67 against the pressure of the spring74. In the assembled position, the

pivot pin 72 is spring urged into engagement with the journal socket 37,and the pivot pin 72 is depressed attendant to the assembly of the doorstructure.

A vertical well 76 is formed in the outer underface of the panel 64 inaxial alignment with the well 65 and the panel lower corner is embracedby a bracket 77. The bracket 77 includes a cross web 78 underlying thebottom face of panel 64 and having a tapped bushing 79 integrally formedtherewith and entering the well 76. Projecting upwardly from the frontand rear edges of the Web 7 8 are front flange 80 and rear wall 81abutting the panel front and rear faces respectively, the rear wall 81being secured to the panel 64 by suitable screws. A second verticalpivot pin 82 which functions as well as a jack for adjusting theelevation of the panel 64 includes a lower pin section 83 engaging thejournal opening 61 and terminating in a tapered end bearing on the baseplate 49. Projecting upwardly from the pin section 83 and coaxialtherewith is a threaded shank 84 engaging the bushing 79 and enteringthe well 76. In order to facilitate the axial adjustment of the pivotpin 82, the threaded shank 84 is provided with six equallycircumferentially spaced longitudinally extending flats 86 which lie invertical planes forming mutual angles of 120. Thus, the shank 84 may beengaged by an open ended hex wrench to permit rotation and axialadjustment thereof. A set screw 87 engages a tapped opening in the lowerpart of the plate 81 and passes through an opening in the panel 64 intoengagement with the shank 84 to releasably lock the pivot pin 82 in apreselected position.

A bracket 88 embraces the upper outer corner of the first panel 63 andincludes a top web 89 overlying the outer top face of the panel 63 and adepending front flange 90 and a rear Wall 91 abutting the front and rearfaces of the panel 63. The bracket rear Wall 91 is secured to the panel63 by suitable screws. An axle 92 is secured to and projects upwardlyfrom the section of the web 89 adjacent to the outer edge of the panel63. A roller 94 is rotatably carried by the axle 92, being spaced fromthe web 89 by a peripheral flange 96 integrally formed with the axle 92and resting on the web 89. The roller 94 enters the track 29 and is atthe level of the flanges 27 to limit the outer edge of the panel 63 to alinear longitudinal movement along the track 27.

In erecting the door structure described above, the track member 16carrying journal blocks 30 at opposite ends thereof is slipped onto thepositioning bar 14 and trued by inserting wedges or shims between thehigher end of the channel web 17 and the confronting face of the bar 14.The lower journal blocks 48 are mounted on the sill 12 in verticalalignment with the track 29 by attaching the base plates 49 to the sill12 by suitable screws. The pivot pin 82 is turned to a partiallyretracted position and the panels 63 and 64 collapsed. The pin section83 is then inserted in the journal opening 61 with the collapsed panelslaterally inclined, and the panels are then swung upwardly to bring thepivot pin 72 and roller into engagement with the track 29. As the panels63, 64 approach their vertical position the top of the pivot pin 74first engages the web section 18 to effect the depression of the pivotpin 72 against the spring 74. The pivot pin 74 then enters and ridesupon the block inclined surface 33 to further depress the pivot pinuntil it reaches the flat surface 34, further longitudinal movementbeing limited by the stop block 36. The top of the panels are thentipped rearwardly to bring the pivot pin into registry with the socket37, the spring 74 raising the pivot pin into engagement with the socket.The journal block 30 and the journal plate 50 are then longitudinallyadjusted to bring the panels 63 and 64 into their desired longitudinaland plumb positions and the height of the outer edge of the panel 64 isadjusted by turning the pivot pin 82 with an end wrench as earlierdescribed. When the door panels have been suitably adjusted the journalblock 30 is locked in position by tightening the bolt 46, the

journal plate 50 is locked in position by tightening the bolt 60 and thepivot pin 82 is locked in position by tightening the set screw 87.

It is clear from the above that the erection of the door assembly is asimple, rapid and highly adaptable operation. Another pair of doorpanels may be similarly mounted along an opposite jamb. Furthermore, ifdesired, the track member may be secured to the bar 14 by screws or thelike.

In FIGURES 9 to 13 of the drawings there is illustrated another form oftrack member and first journal block which may be advantageouslyemployed in the present structure. Specifically, the positioning bar 100which extends along the length of the head has a medially locatedlongitudinal slot 101 formed therein. The track member 102 comprises anupper channel which embraces the bar 100 and includes a cross web 104abutting the underface of the bar 100 and upwardly directed side legs103 frictionally engaging the side faces of the bar 100. Directedupwardly from the web 104 into registry with the slot 101 is a mediallongitudinal arm 106 terminating in an enlarged cylindrical bead 107.The track, per se, includes a front longitudinal arm 108 depending fromthe web 104 and coplanar with the corresponding side leg 103 and a rearlongitudinal arm 109 depending from the web 104 and spaced inwardly ofthe corresponding side leg 103. Inwardly directed coplanar flanges 110are formed along the lower edges of the legs 108 and 109 and terminatein upwardly directed lips 111 spaced by a 10ngitudinally extending slot.

The journal block 112 slidably mates the track and includes a flat topface 113 closely confronting the underface of the web 104 and a verticalflat trailing face 114. The underface 116 of the block 112 issubstantially coplanar with or slightly higher than the underfaces ofthe flanges 110 and has its longitudinal borders 117, which are of awidth substantially that of the distance of the lips 111 from thecorresponding legs 108, 109, raised approximately the thickness of theflanges 110. Formed adjacent the borders 117 are longitudinal slots 118which slidably register with the lips 111, the ribs delineated by theborders 117 slidably resting on the flanges 110. A longitudinalpassageway 119 is formed in the underface of the block 112 transverselyoffset relative to its medial longitudinal axis and extends from theleading face of the block 112 to a point short of the trailing facethereof and terminates in a short transverse passageway 120. The base121 of the passageway 119 is inclined from the upper leading edge of theblock 112 to the horizontal base 122 of the transverse passageway whichbase 122 is slightly above the level of the block underface 116. Asocket defining vertical bore 123 is formed at the terminus of thepassageway 120 and extends through the block 112. The leading side faces126 and 127 of the passageway 119 diverge forwardly to the respectiveslots 118 and the registering lips 111.

In order to lock the block 112 against movement in the track a pair ofdiagonally opposed vertical bores are formed through the block 112slightly inwardly offset relative to the grooves 118 and terminate atthe top face 113 in wells of hexagonal cross-section. A hex nut 128tightly nests in each of the hexagonal wells and is below the level ofthe block top face 113. A hex head bolt 129 registers with each of thelatter vertical bores and engages a corresponding nut 128, nesting in arespective well 125, each of the bolts 129 carrying a washer 130. Thewashers 130 underlie and are adapted to bear against the underfaces ofthe flanges 110 and are clear of the passageways 119 and 120.

The positioning block, journal block and track member last described maybe substituted for those first described and the erection and assemblyand the operation of the resulting door structure are as above setforth.

A further embodiment of the present invention which may be employed togreat advantage is illustrated in FIGURES 14 to 18 of the drawings anddiffers from that last described primarily in the provision of amodified form of track member which facilitates the adjustment andlevelling thereof and the manner of locking the track member in thefinal assembly. Specifically, the track member 140 comprises an uppercoupling channel section defined by a cross web 141 and upwardlydirected front and rear legs 142 and 143 respectively which tightlyembrace the corresponding faces of a longitudinally extending overheadpositioning bar 144. A medially located longitudinally extending strip146 is directed upwardly from the web 141 and engages a mating slot inthe bar 144. Depending from the web 141 are a pair of longitudinal tracklegs 147 which slidably engage a journal block 148 adjustably positionedalong the length thereof, the block 148 being similar to the block 112last described and cooperating with the track in a like manner.

In order to facilitate the longitudinal angular adjustment or levellingof the track member 140 attendant to the assembly of the door structurethere are formed in the channel rearleg 143 a plurality oflongitudinally spaced, longitudinally extending vertical openings 149which pro ject upwardly from the level of the top face of the web 141.Formed in the strip 146 in transverse alignment with the openings 149are corresponding openings 150 which may extend to the top of the strip146 as shown. There are provided one or more shim members 151 which maybe in the form of flat rectangular plates of wood, plastic or the likeof the same or different thicknesses. The shim members 151 aresandwiched between i the confronting faces of the bar 144- and the web141 and are distributed along the bar 144 and web 141 in registry withthe openings 149 and 150 in an arrangement which will effect the desiredangular relationship between the bar 144 and the track member 140. Theshim members are selectively insertable into position through theopenings 149 and 150.

Associated with the track 140 is at least one pair of folding doorpanels in the manner earlier described including an outer panel 152.Embracing and suitably secured to the upper outer corner of the panel152 is a bracket 153 including a top Web 154, a depending front wall 156and a front flange 157. A high crown 158 having an opening formed in thetop thereof surrounded by a fiat peripheral shoulder is formed on theweb 154 and has a bushing 155 depending therefrom into registry with awell 160 formed in the panel 152. A pin 161 extends from the well 160through the bushing 159 into engagement with the journal socket in theblock 148 in the manner earlier described. However, it is important tonote that the crown 158 bears directly on the underface of the block 148whereby to lock the track 140 in position and permit the swinging of thepanel 152.

A second bracket 163 is affixed to and embraces the lower outer cornerof the panel 152 and has associated therewith a vertically adjustablejack defining pivot pin 164 provided with a hexagonal shaped threadedshank 165 and a lock screw 166 similar to and in the manner of thebracket 77, pivot pin 82 and lock screw 87 described earlier. Further, asecond journal member 167 like the journal member 48 is mounted in thedoor sill in vertical alignment with the journal block 148 and engagesthe pivot pin 164.

In erecting the last described door structure, the door panels, thetrack member and the journal members are assembled in the manner earlierdescribed. The track member 140 is vertically angularly adjustedrelative to the upper edge of the door panels to the desired and optimumlevel or inclination and shim members 151 and inserted through selectedof the openings 149 to substan tially fill the space between theconfronting faces of the web 141 and the bar 144 in these areas. Itshould be noted that an opening 149 is in the region of each of thejournal blocks 148 and that the space between the bar and the web in oneof these areas should be filled by shim members 151. Thereafter, thejack pivot pin 164 is turned by means of a suitable tool to raise theouter edge of the panel 152 until the crown 158 bears on the underfaceof the block 148 to lock the track in position and the lock screw 166 isthen tightened. The outer edge of the panel 152 jacked by the pin 164serves as a post or column to support or lock the corresponding end ofthe track member 140.

Referring now to FIGURES l9 and 20 of the drawings, these illustrateanother embodiment of the present invention, which is advantageouslyemployed in connection with an opening where it is desired to close aside section of the opening either with a fixed panel or a single hingedpanel. Heretofore such panels were required to be cut and trimmed tosize directly on the job since the openings were rarely precise andvaried from opening to opening. This was a time-consuming and expensiveprocedure. However, by employing the devices and expedients of thepresent invention the drawbacks of the conventional practice areovercome.

Specifically, there is provided a rectangular side door panel 169preferably of the same height as the associated folding door panels 170and of a width corresponding to that of the side section to be closed.As in the earlier described embodiments there are provided an overhead 3track member 171 located along a positioning bar, journal blocks carriedby the track member, journal plates affixed to the opening sill and pincarrying brackets and followers mounted on the appropriate panels andengaging the journal members and tracks respectively as above set forth.Afiixed to the upper corner of the panel 169 adjacent to the panel 170is a pin carrying bracket assembly 172 similar to the bracket assembly153 and afiixed to the corresponding lower corner of the panel 169 is anadjustable pin carrying bracket assembly 173 similar to the bracketassembly 163. A journal block 174 similar to the block 112 is carried bythe track member 171 in the manner previously described in associationwith the bracket assembly 172 and a journal member 176 is mounted on thesill in association with the bracket assembly 173.

In erecting the door structure last described a stop member or block 177is afiixed to the side wall of the opening directly behind the positionof the rear face of the erected panel 169. The bracket assemblies 172and 173 are brought into engagement with the journal mem bers 174 and176 in the manner earlier set forth and the panel swung into engagementwith the stop 177. Thereafter the folding door assemblies including thepanels 170 are erected. The track member 171 is then adjusted, the panel169 and the various panels 170 are plumbed and leveled and brought intomutual alignment by adjustment of the journal blocks and journal membersincluding 174 and 176 and adjustment of the pins of the lower bracketassemblies including 173. The journal blocks and members and the lowerbracket pins are then locked in position. If the door panel 169 is to befixed in position, a vertical trim bar 178 is preferably afiixed to theopening side wall along the adjacent front border of the panel 169. Itshould be noted that a panel 169 may be positioned in a like manneralong the opposite side section of the door opening.

While there have been described and illustrated preferred embodiments ofthe present invention, it is apparent that numerous alterations,omissions and additions may be made without department from the spiritthereof.

What is claimed is:

1. A door structure comprising an overhead longitudinal positioningmember, a track member including a downwardly facing longitudinal trackand an upwardly facing channel embracing said positioning member andvertically adjustable relative thereto, a first journal blockregistering with said track and having formed therein a socket providedwith a downwardly directed opening and a longitudinally extending guidesurface inclined downwardly toward said socket opening, a pair oflaterally spaced substantially vertical first and second panels hingedlyconnected to each other along their inner adjacent edges, a followermember mounted on and adjacent to the upper outer corner of said firstpanel and longitudinally slidably registering with said track, aretractable vertical first pivot pin mounted on and adjacent to theupper outer corner of said second panel and engaging said socket andaxially movable between a raised and depressed position, spring meansurging said pivot pin to its raised position transversely locked in saidsocket, a first bearing member substantially coaxial with said firstpivot pin and located adjacent the lower outer corner of said secondpanel and supporting said second panel for swinging about a verticalaxis, and a second upwardly facing bearing member located on the top ofsaid second panel adjacent its outer edge and bearing on said firstjournal block to substantially lock said track member against verticalmovement.

2. The door structure of claim 1 wherein said guide surface extendssubstantially to the top face of said journal block.

3. The door structure of claim 1 wherein said socket opening istransversely otfset relative to said inclined guide surface.

4. The door structure of claim 1 wherein said first bearing memberincludes a second pivot pin coaxial with said first pivot pin anddepending from the outer corner of said second panel, a second journalmember mounted below said second panel and having a second socketengaging said second pivot pin, and means for longitudinally adjustingthe position of said second socket.

5. The structure of claim 1 wherein said channel includes a horizontalcross web confronting the underface of said positioning member, andcomprising at least one shim sandwiched between said cross web and saidunderface.

6. The door structure of claim 1 wherein said channel includes ahorizontal cross web and a vertically extending rear leg having anopening formed therein at substantially the level of said cross web.

7. The door structure of claim 1 wherein said second bearing membercomprises an upwardly directed annular boss coaxial with said firstpivot pin.

8. The door structure of claim 1 wherein said track comprises a pair ofdepending transversely spaced longitudinally extending legs havinginwardly directed lips adjacent their lower edges and said first journalblock rests on said flanges.

9. The door structure of claim 8 including a nut member carried by saidfirst journal block, and a depending screw engaging said nut member andpositioned to engage the underface of one of said flanges whereby toreleasably lock said journal block against longitudinal movement.

10. The door structure of claim 1 wherein said first bearing memberincludes a second pivot pin coaxial with said first pivot pin anddepending from the lower outer corner of said second panel, and a secondjournal member mounted below said second panel and having a socketengaging said second pivot pin.

11. The door structure of claim 10 including means for axially adjustingsaid second pivot pin.

References Cited by the Examiner UNITED STATES PATENTS 385,233 6/1888Boda 20-11 1,637,194 7/1927 Koop -118 2,538,148 1/1951 Ebel 16-1762,705,062 3/1955 Bongiovanni 189-75 2,771,970 11/ 1956 Geyser 189-752,774,997 12/ 1956 Zitomer 189-75 2,915,118 12/1959 Capitani 160-2062,918,706 12/1959 Rust et al. 20-522 3,054,447 9/1962 Brydolf 160-2063,058,174 10/1962 Sterling 20-19 3,096,539 7/ 1963 Dickinson et al160209 HARRISON R. MOSELEY, Primrzry Examiner.

BENJAMIN BENDETT, Examiner.

1. A DOOR STRUCTURE COMPRISING AN OVERHEAD LONGITUDINALLY POSITIONINGMEMBER, A TRACK MEMBER INCLUDING A DOWNWARDLY FACING LONGITUDINAL TRACKAND AN UPWARDLY FACING CHANNEL EMBRACING SAID POSITIONING MEMBER ANDVERTICALLY ADJUSTABLE RELATIVE THERETO, A FIRST JOURNAL BLOCKREGISTERING WITH SAID TRACK AND HAVING FORMED THEREIN A SOCKET PROVIDEDWITH A DOWNWARDLY DIRECTED OPENING AND A LONGITUDINALLY EXTENDING GUIDESURFACE INCLINED DOWNWARDLY TOWARD SAID SOCKET OPENING, A PAIR OFLATERALLY SPACED SUBSTANTIALLY VERTICAL FIRST AND SECOND PANELS HINGEDLYCONNECTED TO EACH OTHER ALONG THEIR INNER ADJACENT EDGES, A FOLLOWERMEMBER MOUNTED ON AND ADJACENT TO THE UPPER OUTER CORNER OF SAID FIRSTPANEL AND LONGITUDINALLY SLIDABLY REGISTERING WITH SAID TRACK, ARETRACTABLE VERTICAL FIRST PIVOT PIN MOUNTED ON AND ADJACENT TO THEUPPER OUTER CORNER OF SAID SECOND PANEL AND ENGAGING SAID SOCKET ANDAXIALLY MOVABLE BETWEEN A RAISED AND DEPRESSED POSITION, SPRING MEANSURGING SAID PIVOT PIN TO ITS RAISED POSITION TRANSVERSELY LOCKED IN SAIDSOCKET, A FIRST BEARING MEMBER SUBSTANTIALLY COAXIAL WITH SAID FIRSTPIVOT PIN AND LOCATED ADJACENT THE LOWER OUTER CORNER OF SAID SECONDPANEL AND SUPPORTING SAID SECOND PANEL FOR SWINGING ABOUT A VERTICALAXIS, AND A SECOND UPWARDLY FACING BEARING MEMBER LOCATED ON THE TOP OFSAID SECOND PANEL ADJACENT ITS OUTER EDGE AND BEARING ON SAID FIRSTJOURNAL BLOCK TO SUBSTAN-ER TIALLY LOCK SAID TRACK MEMBER AGAINSTVERTICAL MOVEMENT.